Question

99×13+13 =??? 简便运算

Answer 1

（99+1）×13
=100x13
=1300

Answer 2

（99+1）x13

Answer 3

（99+1）×13
＝100×13
=1300

Answer 4

(99+1)×13=1300

Answer 5

＝（99+1）+13
＝100+13
＝1300